Results 71 to 80 of about 4,607 (203)

Assessing robustness of quantitative susceptibility-based MRI radiomic features in patients with multiple sclerosis

Scientific Reports, 2023
Multiple Sclerosis (MS) is an autoimmune demyelinating disease characterised by changes in iron and myelin content. These biomarkers are detectable by Quantitative Susceptibility Mapping (QSM), an advanced Magnetic Resonance Imaging technique detecting ...
Cristiana Fiscone, Leonardo Rundo, Alessandra Lugaresi, David Neil Manners, Kieren Allinson, Elisa Baldin, Gianfranco Vornetti, Raffaele Lodi, Caterina Tonon, Claudia Testa, Mauro Castelli, Fulvio Zaccagna   +11 more
doaj   +1 more source

The Effect of Oblique Image Slices on the Accuracy of Quantitative Susceptibility Mapping and a Robust Tilt Correction Method [PDF]

, 2021
Quantitative susceptibility mapping (QSM) using the MRI phase to calculate tissue magnetic susceptibility is finding increasing clinical applications. Oblique image slices are often acquired to facilitate radiological viewing and reduce artifacts.
Karsa, A, Kiersnowski, OC, Shmueli, K, Thornton, JS   +3 more
core  

Magnetic Properties of Ferritin at Different Levels of Degradation: Implications for MRI‐Based Iron Quantification in the Brain

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Ferritin's iron core exhibits complex magnetic properties, as suggested by magnetometry and Mössbauer spectroscopy, which remain incompletely understood. In particular, the antiferromagnetic inner core could influence the accuracy of iron quantification using MRI and raise concerns about postmortem validation studies involving degraded
Stefan Ropele, Sowmya Sunkara, Snježana Radulović, Saška Lipovšek, Michael Stöger‐Pollach, Christoph Birkl, Walter Gössler, Christian Enzinger, Gerd Leitinger   +8 more
wiley   +1 more source

Instant tissue field and magnetic susceptibility mapping from MRI raw phase using Laplacian enhanced deep neural networks

NeuroImage, 2022
Quantitative susceptibility mapping (QSM) is an MRI post-processing technique that produces spatially resolved magnetic susceptibility maps from phase data.
Yang Gao, Zhuang Xiong, Amir Fazlollahi, Peter J Nestor, Viktor Vegh, Fatima Nasrallah, Craig Winter, G. Bruce Pike, Stuart Crozier, Feng Liu, Hongfu Sun   +10 more
doaj   +1 more source

Motion‐ and Field‐Robust Mesoscopic Whole‐Brain T2*$$ {T}_2^{\ast } $$‐Weighted Imaging at 7 and 11.7 T Using Servo Navigation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To mitigate artifacts related to motion and field changes in high‐resolution T2*$$ {T}_2^{\ast } $$‐weighted human brain imaging using servo navigation at ultra‐high fields up to 11.7 T. Methods MR‐based servo navigators were integrated into a segmented 3D‐EPI sequence to allow for prospective correction of involuntary head motion and ...
Matthias Serger, Rüdiger Stirnberg, Philipp Ehses, Malte Riedel, Thomas Ulrich, Caroline Le Ster, Franck Mauconduit, Vincent Gras, Alexis Amadon, Alexandre Vignaud, Son Chu, Shajan Gunamony, Maxim Zaitsev, Nicolas Boulant, Klaas P. Pruessmann, Tony Stoecker   +15 more
wiley   +1 more source

Distribution Indices of Magnetic Susceptibility Values in the Primary Motor Cortex Enable to Classify Patients with Amyotrophic Lateral Sclerosis

Brain Sciences, 2022
Quantitative Susceptibility Mapping (QSM) can measure iron concentration increase in the primary motor cortex (M1) of patients with Amyotrophic Lateral Sclerosis (ALS).
Mauro Costagli, Graziella Donatelli, Paolo Cecchi, Paolo Bosco, Gianmichele Migaleddu, Gabriele Siciliano, Mirco Cosottini   +6 more
doaj   +1 more source

Brain microstructure by multi-modal MRI: Is the whole greater than the sum of its parts? [PDF]

, 2017
The MRI signal is dependent upon a number of sub-voxel properties of tissue, which makes it potentially able to detect changes occurring at a scale much smaller than the image resolution. This "microstructural imaging" has become one of the main branches
Bouyagoub, Samira, Cercignani, Mara
core   +3 more sources

Assessment of Optimal T1/T2‐Weighted Combinations for Myelin Sensitivity: Effects of Echo Time and Exponents

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The aim of this study is to improve the traditional T1‐weighted (T1w) over T2‐weighted (T2w) ratio as a proxy for myelin by investigating the optimal T2w TE and combination of exponent‐weighted T1w and T2w images (T1wx1/T2wx2$$ \mathrm{T}1{\mathrm{w}}^{x_1}/\mathrm{T}2{\mathrm{w}}^{x_2} $$).
Simone Monachino, Gerhard S. Drenthen, Lis J. M. van den Boogaard, Marcel Breeuwer, Catarina Dinis Fernandes, Oliver H. H. Gerlach, Svitlana Zinger, Jacobus F. A. Jansen   +7 more
wiley   +1 more source

Towards in vivo ground truth susceptibility for single-orientation deep learning QSM: A multi-orientation gradient-echo MRI dataset

NeuroImage, 2022
Recently, deep neural networks have shown great potential for solving dipole inversion of quantitative susceptibility mapping (QSM) with improved results. However, these studies utilized their limited dataset for network training and inference, which may
Yuting Shi, Ruimin Feng, Zhenghao Li, Jie Zhuang, Yuyao Zhang, Hongjiang Wei   +5 more
doaj   +1 more source

APART-QSM: An improved sub-voxel quantitative susceptibility mapping for susceptibility source separation using an iterative data fitting method

NeuroImage, 2023
AbstractThe brain tissue phase contrast in MRI sequences reflects the spatial distributions of multiple substances, such as iron, myelin, calcium, and proteins. These substances with paramagnetic and diamagnetic susceptibilities often colocalize in one voxel in brain regions.
Zhenghao Li, Ruimin Feng, Qiangqiang Liu, Jie Feng, Guoyan Lao, Ming Zhang, Jun Li, Yuyao Zhang, Hongjiang Wei   +8 more
openaire   +3 more sources